On the dusk of Mondays, partners will engage in such a sexual activity in which the female partner lies down. The other partner places themself in a position where their penis goes into the woman's mouth, and the male's tongue goes into the woman's vagina.
"say lawrence when you go into work on a monday and your not feeling too good does anyone ever say to you sounds like a case of the monday's?""no, no man, shit no, i reckon you'd get your ass kicked saying something like that.